mail domain name changing when sent
Posted on 2011-10-19
We are having a unique issue with exchange 2007 changing domain names randomly when sending to a group. Example I send an email to a group with 20 email addresses that includes firstname.lastname@example.org. I get an error back from the exchange server stating that email@example.com doesn't exist and the mail was not delivered, although the 19 others were delivered without problems. Obviously the name is not in my domain as the address was firstname.lastname@example.org not email@example.com. I am not sure why the exchange server is changing one of the email addresses randomly, but it doesn't seem to be stuck to a particular email address either. It has happened on multiple different addresses but it seems to be always be just one address that is changed out of all of them in the group.
Anyone have any ideas where I can look?